:root{--bg:#fff8f3;--fg:#1f1a17;--muted:#6b625c;--accent:#fa6b40;--card:#ffffff}
@media (prefers-color-scheme:dark){:root{--bg:#161311;--fg:#f4ede8;--muted:#a59b93;--card:#221d1a}}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,"Hiragino Sans","Noto Sans JP",sans-serif;background:var(--bg);color:var(--fg);line-height:1.7}
header{padding:20px 24px;display:flex;align-items:center;gap:12px;max-width:820px;margin:0 auto}
header img{width:40px;height:40px;border-radius:10px}header a{color:var(--fg);text-decoration:none;font-weight:700}
nav a{margin-left:16px;color:var(--muted);font-size:14px;text-decoration:none}nav a:hover{color:var(--accent)}
main{max-width:820px;margin:0 auto;padding:16px 24px 64px}
h1{font-size:2rem;line-height:1.2;margin:.4em 0}h2{margin-top:2em;font-size:1.25rem}
.hero{padding:40px 0 24px}.hero p.lead{font-size:1.15rem;color:var(--muted)}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:12px 20px;border-radius:999px;text-decoration:none;font-weight:700}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:24px 0}
.card{background:var(--card);border-radius:14px;padding:18px;box-shadow:0 1px 3px rgba(0,0,0,.08)}.card h3{margin:0 0 6px;font-size:1rem}.card p{margin:0;color:var(--muted);font-size:.95rem}
footer{max-width:820px;margin:0 auto;padding:24px;color:var(--muted);font-size:13px;border-top:1px solid rgba(128,128,128,.2)}
small,.muted{color:var(--muted)}table{border-collapse:collapse;width:100%}td,th{border-bottom:1px solid rgba(128,128,128,.2);padding:8px;text-align:left;vertical-align:top}